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Keywords = geogrid-reinforced foamed lightweight soil

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16 pages, 4358 KB  
Article
Experimental Study on the Flexural Performance of Geogrid-Reinforced Foamed Lightweight Soil
by Yinhe Li, Yong Liu, Hongbo Zhang, Ning An and Zuolin Fan
Buildings 2025, 15(3), 461; https://doi.org/10.3390/buildings15030461 - 2 Feb 2025
Cited by 2 | Viewed by 1219
Abstract
The flexural behavior of geogrid-reinforced foamed lightweight soil (GRFL soil) is investigated in this study using unconfined compressive and four-point bending tests. The effects of wet density and reinforcement layers on flexural performance are analyzed using load–displacement curves, damage patterns, load characteristics, unconfined [...] Read more.
The flexural behavior of geogrid-reinforced foamed lightweight soil (GRFL soil) is investigated in this study using unconfined compressive and four-point bending tests. The effects of wet density and reinforcement layers on flexural performance are analyzed using load–displacement curves, damage patterns, load characteristics, unconfined compressive strength, and flexural strength. A variance study demonstrates that increasing the wet density significantly increases unconfined compressive strength. Bond stress mechanisms enable geogrid integration, efficiently reroute stresses internally, and greatly increase flexural strength. With a maximum unconfined compressive strength of 3.16 MPa and a peak flexural strength increase of 166%, this reinforcement increases both strength and ductility by changing the damage pattern from brittle to ductile. The principal load is initially supported by the foamed lightweight soil, and in later phases, geogrids take over load-bearing responsibilities. Additionally, the work correlates the ratio of unconfined compressive to flexural strength with wet density and informs the development of predictive models for unconfined compressive strength as a function of reinforcing layers and wet density. Full article
(This article belongs to the Section Building Structures)
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20 pages, 8270 KB  
Article
Numerical Analysis of Differential Settlement in Road Due to Widening Considering Different Reinforcement Techniques
by Shaista Jabeen Abbasi, Xiaolin Weng and Muhammad Jawed Iqbal
Appl. Sci. 2024, 14(5), 1740; https://doi.org/10.3390/app14051740 - 21 Feb 2024
Cited by 3 | Viewed by 4155
Abstract
Embankment and pavement widening of an existing road is a viable option to cope with increased traffic volume. One of the common challenges in road expansion is the occurrence of differential settlement between the old and the new portions. This article pertains to [...] Read more.
Embankment and pavement widening of an existing road is a viable option to cope with increased traffic volume. One of the common challenges in road expansion is the occurrence of differential settlement between the old and the new portions. This article pertains to the field case study of the National Highway-120, where pavement distresses developed in the weak sections of the highway following the operation of traffic within a few months. Field monitoring and geotechnical tests, including the requisite in situ as well as laboratory tests, were conducted on soil specimens from the study area, followed by the performance of a numerical analysis using the two-dimensional finite element software Abaqus CAE 2021 to investigate the weak section of the road. Different techniques such as geogrid reinforcement, installation of cement–fly-ash–gravel (CFG) piles, and lightweight foamed concrete (LWFC) embankment fill were used to analyze the reduction in differential settlement between the old and the widened portions. Among the applied reinforcement techniques, the use of LWFC as embankment fill in the widened portion was determined to be most effective in minimizing the differential settlement in the weak section of the highway. Full article
(This article belongs to the Section Civil Engineering)
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